Refactors app version comparison logic to always include buildVersion

Before, whether or not the source included the buildVersion affected the comparison. If present, the buildVersion was used in comparison, if not, only the version itself was used for comparsion.

This meant it was impossible to update from a version with a buildVersion to the same version without one (e.g. going from betas to final releases). Now we _always_ consider the buildVersion in the comparsion, so an earlier entry in versions array without buildVersion can be considered “newer” even if versions match.

AltStore/Operations/InstallAppOperation.swift

@@ -47,6 +47,9 @@ final class InstallAppOperation: ResultOperation<InstalledApp>
             return self.finish(.failure(OperationError.invalidParameters("InstallAppOperation.main: self.context.certificate or self.context.resignedApp or self.context.provisioningProfiles is nil")))
         }
         
+        @Managed var appVersion = self.context.appVersion
+        let storeBuildVersion = $appVersion.buildVersion
+        
         let backgroundContext = DatabaseManager.shared.persistentContainer.newBackgroundContext()
         backgroundContext.perform {
             
@@ -61,10 +64,14 @@ final class InstallAppOperation: ResultOperation<InstalledApp>
             }
             else
             {
-                installedApp = InstalledApp(resignedApp: resignedApp, originalBundleIdentifier: self.context.bundleIdentifier, certificateSerialNumber: certificate.serialNumber, context: backgroundContext)
+                installedApp = InstalledApp(resignedApp: resignedApp,
+                                            originalBundleIdentifier: self.context.bundleIdentifier,
+                                            certificateSerialNumber: certificate.serialNumber,
+                                            storeBuildVersion: storeBuildVersion,
+                                            context: backgroundContext)
             }
             
-            installedApp.update(resignedApp: resignedApp, certificateSerialNumber: certificate.serialNumber)
+            installedApp.update(resignedApp: resignedApp, certificateSerialNumber: certificate.serialNumber, storeBuildVersion: storeBuildVersion)
             installedApp.needsResign = false
             
             if let team = DatabaseManager.shared.activeTeam(in: backgroundContext)

AltStoreCore/Model/AltStore.xcdatamodeld/AltStore 12.xcdatamodel/contents

@@ -76,6 +76,7 @@
         <attribute name="needsResign" attributeType="Boolean" defaultValueString="NO" usesScalarValueType="YES"/>
         <attribute name="refreshedDate" attributeType="Date" usesScalarValueType="NO"/>
         <attribute name="resignedBundleIdentifier" attributeType="String"/>
+        <attribute name="storeBuildVersion" optional="YES" attributeType="String"/>
         <attribute name="version" attributeType="String"/>
         <relationship name="appExtensions" toMany="YES" deletionRule="Cascade" destinationEntity="InstalledExtension" inverseName="parentApp" inverseEntity="InstalledExtension"/>
         <relationship name="loggedErrors" toMany="YES" deletionRule="Nullify" destinationEntity="LoggedError" inverseName="installedApp" inverseEntity="LoggedError"/>

AltStoreCore/Model/DatabaseManager.swift

@@ -229,7 +229,7 @@ private extension DatabaseManager
             }
             else
             {
-                storeApp = StoreApp.makeAltStoreApp(version: localApp.version, buildVersion: localApp.buildVersion, in: context)
+                storeApp = StoreApp.makeAltStoreApp(version: localApp.version, buildVersion: nil, in: context)
                 storeApp.source = altStoreSource
             }
                         
@@ -242,7 +242,10 @@ private extension DatabaseManager
             }
             else
             {
-                installedApp = InstalledApp(resignedApp: localApp, originalBundleIdentifier: StoreApp.altstoreAppID, certificateSerialNumber: serialNumber, context: context)
+                //TODO: Support build versions.
+                // For backwards compatibility reasons, we cannot use localApp's buildVersion as storeBuildVersion,
+                // or else the latest update will _always_ be considered new because we don't use buildVersions in our source (yet).
+                installedApp = InstalledApp(resignedApp: localApp, originalBundleIdentifier: StoreApp.altstoreAppID, certificateSerialNumber: serialNumber, storeBuildVersion: nil, context: context)
                 installedApp.storeApp = storeApp
             }
             
@@ -322,7 +325,7 @@ private extension DatabaseManager
             let cachedExpirationDate = installedApp.expirationDate
                         
             // Must go after comparing versions to see if we need to update our cached AltStore app bundle.
-            installedApp.update(resignedApp: localApp, certificateSerialNumber: serialNumber)
+            installedApp.update(resignedApp: localApp, certificateSerialNumber: serialNumber, storeBuildVersion: nil)
             
             if installedApp.refreshedDate < cachedRefreshedDate
             {

AltStoreCore/Model/InstalledApp.swift

@@ -60,6 +60,7 @@ public class InstalledApp: NSManagedObject, InstalledAppProtocol
     @NSManaged public var hasAlternateIcon: Bool
     
     @NSManaged public var certificateSerialNumber: String?
+    @NSManaged public var storeBuildVersion: String?
     
     /* Transient */
     @NSManaged public var isRefreshing: Bool
@@ -104,7 +105,7 @@ public class InstalledApp: NSManagedObject, InstalledAppProtocol
         super.init(entity: entity, insertInto: context)
     }
     
-    public init(resignedApp: ALTApplication, originalBundleIdentifier: String, certificateSerialNumber: String?, context: NSManagedObjectContext)
+    public init(resignedApp: ALTApplication, originalBundleIdentifier: String, certificateSerialNumber: String?, storeBuildVersion: String?, context: NSManagedObjectContext)
     {
         super.init(entity: InstalledApp.entity(), insertInto: context)
         
@@ -117,24 +118,30 @@ public class InstalledApp: NSManagedObject, InstalledAppProtocol
         
         self.expirationDate = self.refreshedDate.addingTimeInterval(60 * 60 * 24 * 7) // Rough estimate until we get real values from provisioning profile.
         
-        self.update(resignedApp: resignedApp, certificateSerialNumber: certificateSerialNumber)
+        // In practice this update() is redundant because we always call update() again after init from callers,
+        // but better to have an init that is guaranteed to successfully initialize an object
+        // than one that has a hidden assumption a second method will be called.
+        self.update(resignedApp: resignedApp, certificateSerialNumber: certificateSerialNumber, storeBuildVersion: storeBuildVersion)
     }
 }
 
 public extension InstalledApp
 {
     var localizedVersion: String {
-        let localizedVersion = "\(self.version) (\(self.buildVersion))"
+        guard let storeBuildVersion else { return self.version }
+        
+        let localizedVersion = "\(self.version) (\(storeBuildVersion))"
         return localizedVersion
     }
     
-    func update(resignedApp: ALTApplication, certificateSerialNumber: String?)
+    func update(resignedApp: ALTApplication, certificateSerialNumber: String?, storeBuildVersion: String?)
     {
         self.name = resignedApp.name
         
         self.resignedBundleIdentifier = resignedApp.bundleIdentifier
         self.version = resignedApp.version
         self.buildVersion = resignedApp.buildVersion
+        self.storeBuildVersion = storeBuildVersion
         
         self.certificateSerialNumber = certificateSerialNumber
         
@@ -178,14 +185,7 @@ public extension InstalledApp
     
     func matches(_ appVersion: AppVersion) -> Bool
     {
-        // Versions MUST match exactly.
-        guard self.version == appVersion.version else { return false }
-        
-        // If buildVersion is nil, return true because versions match.
-        guard let buildVersion = appVersion.buildVersion else { return true }
-        
-        // If buildVersion != nil, compare buildVersions and return result.
-        let matchesAppVersion = (self.buildVersion == buildVersion)
+        let matchesAppVersion = (self.version == appVersion.version && self.storeBuildVersion == appVersion.buildVersion)
         return matchesAppVersion
     }
 }
@@ -207,14 +207,18 @@ public extension InstalledApp
             
             "AND",
             
-            // (latestSupportedVersion.version != installedApp.version || (latestSupportedVersion.buildVersion != nil && latestSupportedVersion.buildVersion != installedApp.buildVersion))
-            "(%K != %K OR (%K != '' AND %K != %K))",
+            // latestSupportedVersion.version != installedApp.version || latestSupportedVersion.buildVersion != installedApp.storeBuildVersion
+            //
+            // We have to also check !(latestSupportedVersion.buildVersion == '' && installedApp.storeBuildVersion == nil)
+            // because latestSupportedVersion.buildVersion stores an empty string for nil, while installedApp.storeBuildVersion uses NULL.
+            "(%K != %K OR (%K != %K AND NOT (%K == '' AND %K == nil)))",
         ].joined(separator: " ")
         
         fetchRequest.predicate = NSPredicate(format: predicateFormat,
                                              #keyPath(InstalledApp.isActive), #keyPath(InstalledApp.storeApp), #keyPath(InstalledApp.storeApp.latestSupportedVersion),
                                              #keyPath(InstalledApp.storeApp.latestSupportedVersion.version), #keyPath(InstalledApp.version),
-                                             #keyPath(InstalledApp.storeApp.latestSupportedVersion._buildVersion), #keyPath(InstalledApp.storeApp.latestSupportedVersion._buildVersion), #keyPath(InstalledApp.buildVersion))
+                                             #keyPath(InstalledApp.storeApp.latestSupportedVersion._buildVersion), #keyPath(InstalledApp.storeBuildVersion),
+                                             #keyPath(InstalledApp.storeApp.latestSupportedVersion._buildVersion), #keyPath(InstalledApp.storeBuildVersion))
         return fetchRequest
     }